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US 11,862,426 B1Granted
Electron source devices, electron source assemblies, and methods for generating electrons
AssigneeTeledyne FLIR Detection, Inc.
InventorsJames Mitchell Wells, Douglas K. Martins, Mark Gildersleeve, Rakesh Patel
Life of this patent
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Abstract
The present disclosure provides electron source devices, electron source assemblies, and/or methods for generating electrons. The generated electrons can be used to facilitate spectroscopy, such as mass spectrometry, including mass selection or ion mobility.
Claims20
An electron source device, the device comprising:
- a cathode member operatively aligned with an anode member, both members defining conduits in fluid communication, the cathode member extending along a longitudinal axis defining a center of the cathode member in one cross section;
- a lens conductively associated with the cathode member, the lens defining at least one opening having a center axis offset from the longitudinal axis;
- and
- a pressure differential extending between the cathode member and the anode member, the pressure differential facilitating fluid flow through the cathode member and the anode member.
1 more element
A cathode assembly for an electron source device, the assembly comprising:
- a cathode member operatively aligned with an anode member, the cathode member extending along a longitudinal axis, the longitudinal axis defining a center of the cathode member in one cross section;
- and
- a lens conductively associated with the cathode member, the lens defining at least one opening having a center axis offset from the longitudinal axis.
A lens assembly for an electron source device, the assembly comprising:
- a pair of lenses conductively associated with a cathode member, the cathode member extending along a longitudinal axis, the longitudinal axis defining a center of the cathode member in one cross section;
- and
- wherein the lenses are aligned along the longitudinal axis, wherein a first lens of the pair of lenses defines an opening having a first center axis offset from the longitudinal axis, and wherein a second lens of the pair of lenses defines an opening having a second center axis aligned with the longitudinal axis.
An electron source device, the device comprising:
- a cathode member operatively aligned with an anode member, both members defining conduits in fluid communication, wherein the cathode member extends along a longitudinal axis, the longitudinal axis defining a center of the cathode member in one cross section;
- a pressure differential extending between the cathode member and the anode member, the pressure differential facilitating fluid flow through the cathode member and the anode member;
- a first lens conductively associated with the cathode member, the first lens defining at least one opening having a center axis offset from the longitudinal axis;
- and
- a second lens conductively associated with the cathode member and the first lens, the second lens defining an opening at the center of the second lens.
2 more elements
Dependencies are inferred from the claim text.